AgentDuck is a macOS menu bar app for developers who use AI coding agents. It shows plan limits, tokens and estimated cost for Claude Code, Codex, Grok and Cursor (today, 7 days, 28 days) and exactly when each limit resets. Right next to them: your Mac's CPU, memory, battery, and every dev server holding a localhost port, which you can stop from the panel. No account; your logs stay on your Mac. macOS 14+, Apple silicon. $14.99 with a 3-day free trial.